Homebrew PCBs

I found the correct translation would be rock wool. The term mineral
wool includes both.
Looks more greenish compared to glass wool.

ST

On Sat, Mar 10, 2012 at 9:56 AM, Stefan Trethan <stefan_trethan@...> wrote:
> You should use mineral wool, it has a significantly higher operating
> temperature (750°C).
> Theoretically glass wool should suffice with 500°C but it may be
> hotter than expected very near the heating elements.
>
> There are also ceramic fiber wools with even better temperature
> rating, but much more expensive than the regular building materials.
>
> Mind that you will defeat the thermostat if you insulate the oven.
> With cheap ones the bimetallic element sits right behind the dial and
> is controlled by guesswork and wishful thinking rather than the actual
> oven chamber temperature. But I expect you replaced that long ago
> anyway.
>
> The oven may also rely on thermal losses to keep the heat away from
> certain parts (plastic etc.). You will use your own judgement to
> identify and remedy such problems.
>
> ST
>
> On Sat, Mar 10, 2012 at 7:39 AM, ftkalcevic <frank@...m.au> wrote:
>> I'm using it as a general purpose heating oven too (not food).  I was using it to preheat some moulds.  Sitting at 250C, the "Caution Hot Surface" sticker on the top was at 110C.
>>